ISO 15622:2018 pdf free

ISO 15622:2018 pdf free.Intelligent transport systems一Adaptive cruise control systems
ACC systems shall provide a means for the driver to select a desired set spee Optionally, the driver could be provided with means to accept a set speed that is suggested by in-vehicle devices, e.g. a traffic sign recognition system.
In the “ACC following control” and the“ACC speed control” states, braking by the driver shall deactivate ACC function at least if the driver initiated brake force demand is higher than the ACC initiated brake force. For FSRA-type only: In the “ACC Hold” state it is not mandatory that braking by the driver deactivates the ACC system (leading to ACC standby state; refer to Figure 3).
The ACC-system shall not lead to a significant transient reduction of braking response to the driver’s braking input (refer to ECE-R 13-H) even when the ACC-system has been braking automatically.
The larger of the power demands from either the driver or the ACC system will be used to drive the engine power actuator (e.g. throttle actuator). This always gives the driver authority to override the ACC system engine power control.
If the power demand of the driver is greater than that of the ACC system, automatic braking shall be disengaged with an immediate brake force release. A driver intervention on the accelerator pedal shall not lead to a significant delay of response to driver’s input.
Automatic brake activation shall not lead to locked wheels for periods longer than anti-lock devices (ABS) would allow. This need not require an ABS system.
Automatic power control by ACC shall not lead to excessive positive wheel slip for periods longer than traction control would allow. This need not require a traction control system.
ACC systems may automatically adjust the time gap without action by the driver in order to respond to the driving environment (e.g. poor weather). However, the adjusted time gap shall not be less than the minimum time gap selected by the driver.
If the system allows the driver to select a desired time gap, the selection method shall conform to either one of the following:
1) if the system retains the last selected time gap after it is switched to ACC OFF, as shown in Figure 2,the time gap shall be clearly presented to the driver at least upon system activation;
2) if the system does not retain the last selected time gap after it is switched to ACC OFF, as shown in Figure 2, the time gap shall be set to a predefined default value equal of 1,5 s or greater.
If there is a conventional cruise control function in addition to ACC there shall be no automatic switching between the ACC and conventional cruise control.
Optional: The system may be activated by the driver at standstill even when the driver is applying the brake pedal.ISO 15622 pdf download.